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Urinary excretion of pseudoephedrine after oral administration of pseudoephedrine (120 mg) with 150 mL of an aqueous solution of (−)‐epigallocatechin gallate (EGCG)‐concentrated green tea extract (GTE; ○), or water (●) in 10 healthy volunteers. (a) Cumulative urinary excretion (mg) of pseudoephedrine over 24 hours after administration, (b) percent of dose, and (c) renal clearance (CLR) of pseudoephedrine. Data are expressed as the arithmetic mean ± SD.
